Section 5.1 - System Functional Tests; Introduction; Manual Transfer Switch Operation; Electrical Checks - Generac Power Systems 7 kW NG Repair Manual

Section 5.1
System Functional Tests

INTRODUCTION

Following home standby electric system installation and
periodically thereafter, the system should be tested. Functional
tests of the system include the following:

• Manual transfer switch operation.

• System voltage tests.
• Generator Tests Under Load.
• Testing automatic operation.
Before proceeding with functional tests, read instructions and
information on tags or decals affixed to the generator and
transfer switch. Perform all tests in the exact order given in
this section.

MANUAL TRANSFER SWITCH OPERATION

"W/V-Type" Transfer Switches
1. On the generator panel, set the AUTO-OFF-MANUAL
switch to OFF.
2. Turn OFF the utility power supply to the transfer switch
using whatever means provided (such as a "Utility" main
line circuit breaker).
3. Set the generator main line circuit breaker to OFF (or
open).

Be sure to turn off all power voltage supplies to the
transfer switch before attempting manual operation.
Failure to turn off power voltage supplies to the transfer
switch may result in dangerous and possibly lethal
electrical shock.
LOAD CONNECTED TO
UTILITY POWER SOURCE
Page 144
MANUAL
TRANSFER
HANDLE
TRANSFER
SWITCH
OPERATING
LEVER
Figure 161. Manual Operation "V-Type" Switch
PART 5
4. Remove the manual transfer handle from the enclosure.
5. Place open end of the manual transfer handle over transfer
switch operating lever.
6. To connect LOAD terminal lugs to the utility power source,
move, the handle upward.
7. To connect LOAD terminals to the standby power source,
move the handle downward.
8. Actuate the switch to UTILITY and to MANUAL several
times. Make sure no evidence of binding or interference is
felt.
9. When satisfied that manual transfer switch operation
is correct, actuate the main contacts to their UTILITY
position (Load connected to the utility power supply).

ELECTRICAL CHECKS

Complete electrical checks as follows:
1. Set the generator main circuit breaker to its OFF (or open)
position.
2. Set the generator AUTO-OFF-MANUAL switch to the OFF
position.
3. Turn off all loads connected to the transfer switch
Terminals T1 and T2.
4. Turn on the utility power supply to the transfer switch
using the means provided (such as a utility main line
circuit breaker).
LOAD CONNECTED TO
STANDBY POWER SOURCE
OPERATIONAL TESTS
TRANSFER
SWITCH
OPERATING
LEVER
MANUAL
TRANSFER
HANDLE